Abstract
Antigen-specific human monoclonal antibodies (mAbs) are key candidates for therapeutic agents. However, the availability of a suitable screening system for antigen-specific antibody–secreting cells (ASCs) is limited in humans. Here we present a unique method for detecting individual ASCs using microwell array chips, which enables the analysis of live cells on a single-cell basis and offers a rapid, efficient and high-throughput (up to 234,000 individual cells) system for identifying and recovering objective ASCs. We applied the system to detect and retrieve ASCs for hepatitis B virus and influenza viruses from human peripheral blood lymphocytes and produced human mAbs with virus-neutralizing activities within a week. Furthermore, we show that the system is useful for detecting ASCs for multiple antigens as well as for selection of ASCs secreting high-affinity antibodies on a chip. Our method can open the way for the generation of therapeutic antibodies for individual patients.
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Acknowledgements
We thank S. Hirota for technical assistance and K. Hata for secretarial work. We are very grateful to M. Isobe and N. Kurosawa, Laboratory of Molecular and Cellular Biology, Graduate School of Science and Engineering, University of Toyama, for their generous supply of an antibody expression system. We thank H. von Boehmer, Dana-Farber Cancer Institute, Harvard Medical School, for 110TC cells. This research was supported by grants from the Toyama Medical Bio-Cluster Project and a Grant-in-Aid of the Ministry of Education, Culture, Sports, Science and Technology, Japan. A.J., K.K. and S.Kadowaki were supported by a postdoctoral fellowship from the Toyama Medical Bio-Cluster Project.
Author information
Author notes
- Aishun Jin
- , Tatsuhiko Ozawa
- & Kazuto Tajiri
These authors contributed equally to this work.
Affiliations
Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.
- Aishun Jin
- , Tatsuhiko Ozawa
- , Kazuto Tajiri
- , Sachiko Kondo
- , Koshi Kinoshita
- , Shinichi Kadowaki
- , Hiroyuki Kishi
- & Atsushi Muraguchi
SC World Inc., Toyama, Japan.
- Aishun Jin
The Third Department of Internal Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.
- Kazuto Tajiri
- & Toshiro Sugiyama
Central Research Institute, Toyama Industrial Technology Center, Takaoka, Toyama, Japan.
- Tsutomu Obata
Department of Infectious Diseases, Osaka Prefectural Institute of Public Health, Osaka, Japan.
- Kazuo Takahashi
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Contributions
A.J. established the ISAAC protocol; T. Ozawa analyzed influenza-specific antibodies; K. Tajiri analyzed HBs antigen–specific antibodies; T. Obata developed microwell array chip for ISAAC; S. Kondo and K.K. constructed antibody expression vectors; S. Kadowaki analyzed cells; K. Takahashi analyzed influenza virus neutralization activity; T.S. supervised the project; and H.K. and A.M. organized and conducted the project.
Competing interests
The immunospot array assay on a chip (ISAAC) procedure has been registered for Japan Patent Office patent JP 4148367.
Corresponding author
Correspondence to Hiroyuki Kishi.
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Supplementary Text and Figures
Supplementary Figs. 1–3, Supplementary Table 1 and Supplementary Methods
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